Do yourself a big favor and get the right stool testing done - finding the culprit is the first key in eradication. I have been around cz too long and read too many stories about self-diagnosis - I spun my wheels but not knowing the problem which in my case turned out to be a rare protozoa parasite that requires a special approach. Metametrix offers the best test done using PCR analysis - use panel #2105

If you happen to test for protozoa parasites, I have an outside forum at pptu.lefora.com